feat: Add WinCaster remote control features for Winhanced companion app

[theLastGuppy]

WinCaster enables seamless game streaming to Android TVs by providing:

• TCP Command Service (WinCasterCommandService.java):

  • Listens on port 47990 for JSON commands from Winhanced
  • Handles stream, stop, status, and ping commands
  • Runs as foreground service with specialUse type

• mDNS Advertiser (WinCasterAdvertiser.java):

  • Advertises _wincaster._tcp service on network
  • Uses NsdManager on Android 14+, jmDNS on older versions
  • Includes TXT records: name (device model), version, platform

• Deep Link Handler (WinCasterDeepLinkActivity.java):

  • Handles wincaster://stream?host=X&uuid=Y&name=Z&app=A URLs
  • Looks up host in paired computers and starts streaming

• Boot Receiver (WinCasterBootReceiver.java):

  • Starts WinCasterCommandService on device boot
  • Handles BOOT_COMPLETED, LOCKED_BOOT_COMPLETED, QUICKBOOT_POWERON

• Package/branding updates:

  • Changed namespace/applicationId to com.winhanced.wincaster
  • Changed app name to "WinCaster"
  • Removed root flavor (not needed for TV use case)
  • Set version to 1.0.0

• AndroidManifest updates:

  • Added RECEIVE_BOOT_COMPLETED, FOREGROUND_SERVICE, FOREGROUND_SERVICE_SPECIAL_USE permissions
  • Registered all new components

• PcView.java updates:

  • Starts WinCasterCommandService and WinCasterAdvertiser on launch

• ComputerManagerService updates:

  • Added getComputers() method for listing paired hosts